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1、技術文件技術文件名稱：LTE信令流程介紹技術文件編號：版本：擬制審核會簽標準化批準目錄1概念介紹51.1控制面和用戶面協議棧51.2承載概念51.3連接概念62開機附著流程72.1正常流程72.2異常流程102.2.1RRC連接建立失敗102.2.2核心網拒絕112.2.3eNB未等到Initialcontextsetuprequest消息122.2.4RRC重配消息丟失或者沒收到RRC重配完成消息或者eNB內部配置UE的安全參數等失敗133UE發(fā)起的SERVICEREQUEST流程153.1正常流程153.2異常流程173.2.1RRC連接建立失敗173.2.2核心網拒絕183
2、2.3eNB未等到Initialcontextsetuprequest消息193.2.4RRC重配消息丟失或者eNB內部配置UE的安全參數失敗或者沒有建立起來一個非GBR承載193.2.5eNB建立專用承載失敗193.2.6eNB建立默認承載失敗194網絡發(fā)起的PAGING流程214.1S_TMSI尋呼214.2IMSI尋呼215TAU流程：215.1正常流程225.1.1IDLE下發(fā)起的225.1.2CONNECTED下發(fā)起的265.2異常流程266去附著276.1關機去附著276.2非關機去附著277切換流程298專用承載建立流程318.1正常流程318.2異常流程338.2
3、.1核心網拒絕338.2.2eNB本地建立失敗（核心網主動發(fā)起的建立）338.2.3eNB未等到RRC重配完成消息，回復失敗358.2.4UENAS層拒絕358.2.5上行直傳NAS消息丟失379專用承載修改流程389.1正常流程389.1.1修改QoS399.1.2不修改QoS，只修改TFT409.2異常流程419.2.1核心網拒絕419.2.2eNB回復失敗419.2.3UENAS層拒絕419.2.4上行直傳NAS消息丟失4110專用承載釋放流程4211空口RRC信令431概念介紹1.1控制面和用戶面協議棧控制面協議棧用戶面協議棧1.2承載概念EPSbearer:AnEPSb
4、eareruniquelyidentifiestrafficflowsthatreceiveacommonQoStreatmentbetweenaUEandaPDNGWE-RAB:AnE-RABuniquelyidentifiestheconcatenationofanS1BearerandthecorrespondingDataRadioBearer.WhenanE-RABexists,thereisaone-to-onemappingbetweenthisE-RABandanEPSbeareroftheNonAccessStratum.DataRadioBearer:theD
5、ataRadiobearertransportsthepacketsofanE-RABbetweenaUEandaneNB.Thereisanone-to-onemappingbetweentheE-RABandtheDataRadioBearer。（eNB）Figure13.1-1:EPSBearerServiceArchitectureDefaultBearer:TheEPSbearerwhichisfirstestablishedforanewPDNconnectionandremainsestablishedthroughoutthelifetimeofthePDNcon
6、nection.Non-GBRbearer:AnEPSbearerthatusesnetworkresourcesthatarenotrelatedtoaguaranteedbitrate(GBR)value.GBRbearer:relatedtoaguaranteedbitrate(GBR)value.1.3連接概念Uu（X1）:interfacebetweenanUEandE-UTRAN.S1:interfacebetweenaneNBandanEPC,providinganinterconnectionpointbetweentheE-UTRANandtheEPC.UE-a
7、ssociatedlogicalS1-connection:TheUE-associatedlogicalS1-connectionusestheidentitiesMMEUES1APIDandeNBUES1APIDaccordingtodefinitionin[23.401].ForareceivedUEassociatedS1-APmessagetheMMEidentifiestheassociatedUEbasedontheMMEUES1APIDIEandtheeNBide
